L-Cysteine Hydrochloride, Anhydrous, ≥99.0% | CAS 52-89-1

L-Cysteine Hydrochloride, Anhydrous, ≥99.0% (RT) - 10g

SKU: 30120-10G
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For laboratory, institutional, and professional use only. Not available for residential or personal purchase. Orders are subject to verification.

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L-Cysteine hydrochloride (1:1), anhydrous, ≥99.0% (RT), is a high-purity amino acid derivative supplied as a white crystalline powder. This material is widely used in peptide synthesis, biochemical research, and pharmaceutical development.

As a hydrochloride salt of L-cysteine, it offers improved stability and solubility in aqueous systems. It is suitable for applications requiring controlled impurity profiles and defined optical activity, including synthetic chemistry, protein modification, and redox studies.

Chemical Name: L-Cysteine hydrochloride (1:1), anhydrous
Linear Formula: HSCH₂CH(NH₂)COOH · HCl
CAS Number: 52-89-1
Molecular Weight: 157.62 g/mol
Assay: ≥99.0% (RT)
Form: Powder or crystals
EC Number: 200-157-7
MDL Number: MFCD00064553
NACRES: NA.77
PubChem ID: 329753437

Specifications

L-Cysteine Hydrochloride, Anhydrous, ≥99.0% (RT)

• Assay: ≥99.0% (RT)
• Form: Powder or crystals
• Appearance: White
• Optical Rotation: [α]20/D +6.4 ± 0.3°, c = 5% in 5 M HCl
• Melting Point: 174.1–174.7 °C
• Solubility: H₂O 1 g/10 mL, clear, colorless
• Foreign Amino Acids: ≤0.5%
• Ignition Residue: ≤0.1% (as SO₄)
• Loss on Drying: ≤1.0%
• Sulfate (SO₄²⁻): ≤100 mg/kg

Cation Traces (max limits):
• Ca: ≤10 mg/kg
• Cd: ≤5 mg/kg
• Co: ≤5 mg/kg
• Cr: ≤5 mg/kg
• Cu: ≤5 mg/kg
• Fe: ≤5 mg/kg
• K: ≤50 mg/kg
• Mg: ≤5 mg/kg
• Mn: ≤5 mg/kg
• NH₄⁺: ≤500 mg/kg
• Na: ≤50 mg/kg
• Ni: ≤5 mg/kg
• Pb: ≤5 mg/kg
• Zn: ≤5 mg/kg

• Quality Level: 200
• Application: Peptide synthesis
• Storage Temperature: Room temperature

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